20142433 has 6 divisors (see below), whose sum is σ = 21397286. Its totient is φ = 18957312.

The previous prime is 20142427. The next prime is 20142481. The reversal of 20142433 is 33424102.

It can be written as a sum of positive squares in 3 ways, for example, as 15618304 + 4524129 = 3952^2 + 2127^2 .

It is not a de Polignac number, because 20142433 - 2⁵ = 20142401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20142433.

It is not an unprimeable number, because it can be changed into a prime (20142833) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34560 + ... + 35137.

Almost surely, 2^20142433 is an apocalyptic number.

It is an amenable number.

20142433 is a deficient number, since it is larger than the sum of its proper divisors (1254853).

20142433 is an equidigital number, since it uses as much as digits as its factorization.

20142433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69731 (or 69714 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 20142433 is about 4488.0321968542. The cubic root of 20142433 is about 272.0846090952.

Adding to 20142433 its reverse (33424102), we get a palindrome (53566535).

The spelling of 20142433 in words is "twenty million, one hundred forty-two thousand, four hundred thirty-three".